Why can't you get a copy of the game against the computer?
No. I can't remember a game of over 80 moves off the top of my head.

The chess computer used here is a standard bit of software seen in a few places on the net. I'm sure the Chess.com techie's will develop something nicer eventually, but this may not be near the top of the long list of to-do's!
In the meantime, you could write the moves down, if you want to keep a record of them. Or download a simple pgn program like ChessCat and copy the moves into that as you are playing.
I won a game against the computer using the Bongcloud and didn't write it down because I thought I would be able to a copy after the game. Why didn't someone code in the ability to get a transcript after like in the regular games?